My car is making a roaring sound from tires when I drive is it the brake drum

It's in the rear tires it sounds like?? If it was the brake drum then it would only be when I use the brakes but it does it all the time..do u have any idea y??

All the time and usually getting louder as you accelerate? Most likely a worn out wheel bearing that needs replaced.

Yes that's exactly what it's doing...so are wheel bearings and labor expensive ?

Probably about 180-250 per side. So, if you need 1 on each side, 360-500 would be about average.